Why does vaccination work?

Answer 1

viruses are grown, then killed, then particulated. The particulate matter is used to create a vaccine. The vaccine when injected causes the body to react by creating antibodies to the foreign protien of the vaccine, so when next the body is exposed to the protien in the form of a living virus, the antibodies are present to destroy the virus before it can proliferate in the body enough to cause disease. Live virus injections have not been used in the manufacture of injectable vaccines for over a decade.

Answer 2

The purpose of a vaccine is to stimulate a immune response to a virus without causing you illness. So when you come into contact with the real virus, you will have a quick response to it and won't have any signs/symptoms from it.
There are two major categories of vaccine: live and killed. Some vaccines have the whole virus, and some have only parts. Current live vaccines in production include influenza, measles, mumps, rubella, and oral polio vaccine (which is not made anymore in the U.S. but is in other countries). Current dead vaccines include diptheria, tetanus, rabies, typhoid, HBV, and injectable polio vaccine.

Answer 3

a vaccination is an inert virus that would not naturally affect humans but is extremely close to a human virus. the immune system fights it and then recognizes the actual virus and can prevent it from affecting your body.